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Soiling is a crucial problem for solar energy power plants particularly in regions that have high soiling rates, dust storms, water scarcity and a great solar energy potential. Moreover, in areas with high humidity, the cementation of dust particles seems to be highly impacted by dew condensation on the front surface of solar panels. This impact can have a positive or negative effect depending on the climatic conditions and the surface properties. This review presents a critical investigation of studies regarding the effect of dew on soiling with a focus on the existing solutions to mitigate soiling by dew. Through this work, the papers have been studied and classified whether dew was the main topic of the paper or it is just mentioned as influencing factor on soiling. Furthermore, the dew effect was investigated whether it is experimentally found or just expected. Two kinds of solutions relying on either the enhancement of dew water or its mitigation have been highlighted in this review. About 61% of papers dealt with dew-soiling nexus have given a great interest to the enhancement of dew water formation ensuring solar panels self-cleaning, thus increasing their performance, while 39% of papers have recommended dew suppression. From a sustainability point of view, this work shows that instead of using conventional water resources that are limited, dew as a nonconventional water source may significantly be exploited to mitigate soiling losses in solar energy power plants. |
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